Sangodapo, Taiwo Olubunmi, and Babatunde Oluwaseun Onasanya. “BIPOLAR PICTURE FUZZY SUBGROUP OF A GROUP: BIPOLAR PICTURE FUZZY SUBGROUP”. Journal of the Nigerian Mathematical Society 42, no. 2 (July 28, 2023): 111–139. Accessed May 10, 2024. https://ojs.ictp.it/jnms/index.php/jnms/article/view/948.